Security-57336.1.9.tar.gz

[apple/security.git] / Security / libsecurity_cdsa_utilities / lib / callback.cpp

diff --git a/Security/libsecurity_cdsa_utilities/lib/callback.cpp b/Security/libsecurity_cdsa_utilities/lib/callback.cpp
deleted file mode 100644 (file)
index 72a1636..0000000
--- a/Security/libsecurity_cdsa_utilities/lib/callback.cpp
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * Copyright (c) 2000-2001,2003-2004,2006,2011-2012,2014 Apple Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// Encapsulate the callback mechanism of CSSM.
-//
-#include <security_cdsa_utilities/callback.h>
-
-
-//
-// Invoke a callback
-//
-void ModuleCallback::operator () (CSSM_MODULE_EVENT event,
-                                  const Guid &guid, uint32 subId,
-                                  CSSM_SERVICE_TYPE serviceType) const
-{
-    try
-    {
-        if (mCallback)
-            if (CSSM_RETURN err = mCallback(&guid, mContext, subId, serviceType, event))
-                CssmError::throwMe(err);
-    }
-    catch (...)
-    {
-    }
-}
-
-
-//
-// Manage Callback sets.
-// THREADS: Caller is ensuring single-thread access on these calls.
-//
-void ModuleCallbackSet::insert(const ModuleCallback &newCallback)
-{
-    callbacks.insert(CallbackMap::value_type(newCallback, new CountingMutex));
-}
-
-void ModuleCallbackSet::erase(const ModuleCallback &oldCallback)
-{
-    CallbackMap::iterator it = callbacks.find(oldCallback);
-    if (it == callbacks.end()) // not registered; fail
-        CssmError::throwMe(CSSMERR_CSSM_INVALID_ADDIN_HANDLE);
-    CountingMutex *counter = it->second;
-    {
-        StLock<Mutex> _(*counter);
-        if (!counter->isIdle()) // callbacks are scheduled against this
-            CssmError::throwMe(CSSM_ERRCODE_FUNCTION_FAILED);  // @#module is busy
-    }
-    // counter is zero (idle), and we hold the entry lock (via our caller)
-    delete counter;
-    callbacks.erase(it);
-}
-
-
-//
-// Invoke an entire callback set.
-// THREADS: Caller is ensuring  single-thread access on these calls.
-//
-void ModuleCallbackSet::operator () (CSSM_MODULE_EVENT event,
-                                     const Guid &guid, uint32 subId,
-                                     CSSM_SERVICE_TYPE serviceType) const
-{
-    if (callbacks.empty())     // nothing to do; quick exit
-        return;
-
-#if _USE_THREADS == _USE_NO_THREADS || defined(SYNCHRONOUS_CALLBACKS)
-    // no threading model supported - we HAVE to do this right here
-    // note that the user better not re-enter CSSM too much,
-    // or we might deadlock...
-    for (CallbackMap::const_iterator it = callbacks.begin();
-         it != callbacks.end(); it++) {
-        it->first(event, guid, subId, serviceType);
-    }
-#else // real threads available
-    // lock down all callback elements - still protected by global lock (via caller)
-    for (CallbackMap::iterator it = callbacks.begin();
-         it != callbacks.end(); it++)
-        it->second->enter();
-
-    // get out of this thread - now!
-    (new Runner(callbacks, event, guid, subId, serviceType))->run();
-#endif
-}
-
-void ModuleCallbackSet::Runner::action()
-{
-    //
-    // NOTE WELL: Our callbacks map shares (pointed-to) values with the ModuleCallbackSet
-    // we were created from. Some of these values may be dangling pointers since they have
-    // been destroyed by other threads, but only *after* we are done with them, since
-    // we must call exit() on them before they become eligible for destruction.
-    // In all cases, it is the responsibility of other threads to destroy those mutexi.
-    //
-    // @@@ Could also fan out to multiple callback threads in parallel.
-    for (CallbackMap::iterator it = callbacks.begin();
-         it != callbacks.end(); it++) {
-        //@@@ safety vs. convenience - recheck
-        it->first(event, guid, subserviceId, serviceType);
-        it->second->exit();
-    }
-}